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Electrophotographic photoconductor, image forming apparatus, and process cartridge

Active Publication Date: 2016-05-19
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, an electric characteristic of the photoconductor deteriorates and an electrical stability in the long usage cannot be maintained.
For example, decrease in image density, background fog, residual image, and/or non-homogeneous image after continuous printing may be caused.
However, leak resistant function by covering surface of the support is insufficient because a thickness of the undercoat layer is range of 1 μm to several μm.
The content of the titanium oxide particle is approximately 80% of the undercoat layer, it is difficult to maintain the dispersibility of the titanium oxide particle

Method used

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  • Electrophotographic photoconductor, image forming apparatus, and process cartridge
  • Electrophotographic photoconductor, image forming apparatus, and process cartridge
  • Electrophotographic photoconductor, image forming apparatus, and process cartridge

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0134]FIG. 1 is a schematic cross-sectional view of an electrophotographic photoconductor according to an embodiment of the present invention. The electrophotographic photoconductor illustrated in FIG. 1 has a single-layer photosensitive layer. This electrophotographic photoconductor includes, from the innermost side thereof, a conductive support 31, an undercoat layer 32, and a single-layer photosensitive layer 33.

second embodiment

[0135]FIG. 2 is a schematic cross-sectional view of an electrophotographic photoconductor according to another embodiment of the present invention. The electrophotographic photoconductor illustrated in FIG. 2 has a multi-layer photosensitive layer. This electrophotographic photoconductor includes, from the innermost side thereof, a conductive support 31, an undercoat layer 32, a charge generation layer 35, and a charge transport layer 37. The charge generation layer 35 and the charge transport layer 37 correspond to the photosensitive layer.

third embodiment

[0136]FIG. 3 is a schematic cross-sectional view of an electrophotographic photoconductor according to another embodiment of the present invention. The electrophotographic photoconductor illustrated in FIG. 3 has a single-layer photosensitive layer. This electrophotographic photoconductor includes, from the innermost side thereof, a conductive support 31, an undercoat layer 32, a single-layer photosensitive layer 33, and a protective layer 39.

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Abstract

A electrophotographic photoconductor is provided. The electrophotographic photoconductor includes a conductive support, an undercoat layer overlying the conductive support, and a photosensitive layer overlying the undercoat layer. The undercoat layer includes a metal oxide particle, binder resin, and a compound having a urea group.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This patent application is based on and claims priority pursuant to 35 U.S.C. §119(a) to Japanese Patent Application Nos. 2014-234651, filed on Nov. 19, 2014, respectively, in the Japan Patent Office, the entire disclosure of each of which is hereby incorporated by reference herein.BACKGROUND[0002]1. Technical Field[0003]The present disclosure relates to an electrophotographic photoconductor, and an image forming apparatus and a process cartridge.[0004]2. Description of the Related Art[0005]In an image forming method performed by an image forming apparatus, an image is formed by exposing an electrophotographic photoconductor (hereinafter may be referred to as “photoconductor”) to the processes of charging, irradiation, developing, transfer, etc. Nowadays, organic photoconductors (OPC) that use organic materials are widely used as the electrophotographic photoconductor in terms of their flexibility, thermal stability, and film formation pr...

Claims

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Application Information

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IPC IPC(8): G03G15/00
CPCG03G5/144
Inventor ISHIDA, TOSHIHIROKURIMOTO, EIJISUZUKI, TETSUROASANO, TOMOHARUNII, DAISUKE
Owner RICOH KK